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 = GROOVE RADAR =
 Introduced in [[AC DDRMAX|DDRMAX -DanceDanceRevolution 6thMIX-]], the '''GROOVE RADAR''' (グルーヴレーダー) is a graphical representation of a song difficulty using a pentagon shape. Originally meant to be the successor to the traditional Feet/Number Level system, both the Feet/Number Level and GROOVE RADAR have been used since [[AC DDRMAX2|DDRMAX2 -DanceDanceRevolution 7thMIX-]] due to negative reception over the GROOVE RADAR being the only representation of song difficulty. Starting from [[AC DDR 2014|DanceDanceRevolution (2014)]], the GROOVE RADAR numerical values for a chart are always shown on the song select screen. Different values will appear on the GROOVE RADAR depending on the difficulty currently selected for a song. Before [[AC DDR SuperNOVA|DanceDanceRevolution SuperNOVA]], BEGINNER charts had no Groove Radar data at all.
-The beatmania IIDX series has a similar feature, the NOTES RADAR, introduced in [[AC HEROIC VERSE|beatmania IIDX 27 HEROIC VERSE]] but with six parameters instead of five.
 '''Note:''' The GROOVE RADAR calculations are derived from [[AC DDR 2013|DanceDanceRevolution (2013)]] but are valid for later installments of the DanceDanceRevolution arcade series.
 == STREAM ==
-'''STREAM''' is denoted as the amount of sets of steps that are right after one another (step density) in the song. The song with the highest STREAM values is [[EGOISM 440]], which has Single and Double CHALLENGE charts with STREAM values of 226 and 270, respectively.
+'''STREAM''' (全体密度) is denoted as the amount of sets of steps that are right after one another (step density) in the song. The song with the highest STREAM values is [[EGOISM 440]], which has Single and Double CHALLENGE charts with STREAM values of 226 and 270, respectively.
 It is actually calculated as the average number of steps per minute, calculated as the following:
@@ Line 27: / Line 25: @@
 # [[MAX 360]] (CHALLENGE): 222
 # [[Lachryma(Re:Queen'M)|Lachryma《Re:Queen’M》]] (CHALLENGE): 207
+# [[VOLAQUAS]] (CHALLENGE): 202
 # [[888]] (CHALLENGE): 200
-# [[ENDYMION]] (CHALLENGE): 198
 ; Rankings (Double)
@@ Line 34: / Line 32: @@
 # MAX 360 (CHALLENGE): 247
 # Lachryma《Re:Queen’M》 (CHALLENGE): 229
-# ENDYMION (CHALLENGE): 224
+# [[ENDYMION]] (CHALLENGE): 224
-# POSSESSION (20th Anniversary Mix) (CHALLENGE): 223
+# POSSESSION (20th Anniversary Mix) (CHALLENGE) / VOLAQUAS (CHALLENGE): 223
 ; Highest STREAM values per difficulty
@@ Line 54: / Line 52: @@
 == VOLTAGE ==
-'''VOLTAGE''' refers to the peak density of the arrows of the song. It is the highest density of arrows that appear on the screen at once in one measure (four beats). Charts with sections very densely packed with notes and featuring high average BPMs generally have high VOLTAGE values. The chart with the highest VOLTAGE value is [[ACE FOR ACES]]' Single CHALLENGE, with 260.
+'''VOLTAGE''' (最大密度) refers to the peak density of the notes of the song. It is the highest density of notes that appear on the screen at once in one measure (four beats). Charts that feature sections very densely packed with notes and high average BPMs generally have high VOLTAGE values. The chart with the highest VOLTAGE value is [[ACE FOR ACES]]' Single CHALLENGE chart, with 260.
-To calculate VOLTAGE, find the average BPM of the song first. The average BPM is calculated as:
+To calculate VOLTAGE, the first step is to find the average BPM of the song. It is calculated as the following:
 <pre>Average BPM = 60 × Song Length (beats) ÷ Song Length (sec)</pre>
-where Song Length is determined both in beats and in seconds; both are measured from the beginning (usually right when the music starts) all the way to the end (when it says "CLEARED"). Once the average BPM is found, find the Peak Density (the maximum number of notes, including Shock Arrows, if any, that occur in four consecutive beats) and divide by 4 to find the Average Peak Density Per Minute value, which is always an integer number. If a song has no stops or BPM changes, use the song's BPM instead.
+The Song Length variable is measured in quarter beats and seconds. Both are measured from the beginning, usually right as soon as the music starts, all the way to the end when it says "CLEARED". Songs that run at very high BPMs for the majority of the song will commonly have a high average BPM. Once the average BPM is found, the next step is to find the Peak Density, which is the maximum number of notes, including Shock Arrows, that occur in four consecutive beats. Take the average BPM of the song (or chart, if it has its own BPM changes and stops), multiply it by the Peak Density (usually a number between 8 and 16), and then divide by 4 to find the Average Peak Density value.
-* If Average Peak Density Per Minute is equal to or less than 600, VOLTAGE = Average Peak Density Per Minute ÷ 6.
+<pre>Average Peak Density = Average BPM × Peak Density ÷ 4</pre>
-* If Average Peak Density Per Minute is equal to or greater than 600, VOLTAGE = (Average Peak Density Per Minute + 594) × 100 ÷ 1194.
+Note that the resulting Average Peak Density is rounded down to the nearest integer. If the song/chart in question runs at a constant BPM, use the BPM of the song/chart instead.
+* If the Average Peak Density is equal to or less than 600, VOLTAGE = Average Peak Density ÷ 6.
+* If the Average Peak Density is equal to or greater than 600, VOLTAGE = (Average Peak Density + 594) × 100 ÷ 1194.
 ; Examples
-# [[New Generation]] (Single EXPERT): 300 beats in 94.7368 seconds, Peak Density = 12, APD = 570, VOLTAGE = 95.
+# [[Ishtar]] (Single/Double EXPERT):
-# [[Blew My Mind]] (Single/Double CHALLENGE): 520 beats in 99.9474 seconds, Peak Density = 23, APD = 1794, VOLTAGE = 200.
+#* 276 beats in 106.1538 seconds,
+#* Average BPM = 156,
+#* Peak Density = 12,
+#* Average Peak Density = 468,
+#* VOLTAGE = 78.
+# [[Blew My Mind]] (Single/Double CHALLENGE)
+#* 520 beats in 99.9474 seconds,
+#* Average BPM = 312.16,
+#* Peak Density = 23,
+#* Average Peak Density = 1794,
+#* VOLTAGE = 200.
 ; Rankings (Single)
 # ACE FOR ACES (CHALLENGE): 260
 # Blew My Mind (CHALLENGE): 200
+# [[Come To m1dy]] (CHALLENGE): 191
 # [[Cosy Catastrophe]] (CHALLENGE): 188
 # [[London EVOLVED|London EVOLVED ver.A]] (EXPERT/CHALLENGE): 177
-# [[POSSESSION]] (EXPERT/CHALLENGE): 161
 ; Rankings (Double)
 # ACE FOR ACES (CHALLENGE): 247
 # Blew My Mind (CHALLENGE): 200
+# Come To m1dy (CHALLENGE): 191
 # Cosy Catastrophe (CHALLENGE): 188
 # London EVOLVED ver.A (CHALLENGE): 177
-# POSSESSION (EXPERT/CHALLENGE): 161
 ; Highest VOLTAGE values per difficulty
@@ Line 90: / Line 100: @@
 ** BASIC: MAX 360 (112)
 ** DIFFICULT: [[Pluto Relinquish]] (145)
-** EXPERT: POSSESSION (161)
+** EXPERT: [[POSSESSION]] (161)
 ** CHALLENGE: ACE FOR ACES (247)
@@ Line 97: / Line 107: @@
 == AIR ==
-'''AIR''' refers to the total number of jumps and Shock Arrows in the chart. POSSESSION (20th Anniversary Mix)'s DOUBLE CHALLENGE chart holds the current highest AIR value of 224.
+'''AIR''' (ジャンプ度) refers to the total number of jumps and Shock Arrows in the chart. POSSESSION (20th Anniversary Mix)'s DOUBLE CHALLENGE chart holds the current highest AIR value of 224.
 It is calculated similarly to STREAM except only jumps and Shock Arrows are involved:
@@ Line 114: / Line 124: @@
 ; Rankings (Single)
 # Right on time (Ryu☆Remix) (CHALLENGE): 200
+# [[WARNINGxWARNINGxWARNING|WARNING×WARNING×WARNING]] (CHALLENGE): 169
 # [[Prey]] (CHALLENGE): 167
 # [[TWINKLE HEART|TWINKLE♡HEART]] (CHALLENGE): 165
 # [[Firestorm]] (CHALLENGE): 162
-# [[DYNAMITE RAVE|DYNAMITE RAVE ("AIR" Special)]] (CHALLENGE): 159
 ; Rankings (Double)
+# [[MEGALOVANIA]] (CHALLENGE): 245
 # POSSESSION (20th Anniversary Mix) (CHALLENGE): 224
 # Right on time (Ryu☆Remix) (CHALLENGE): 200
+# MEGALOVANIA (EXPERT): 198
 # [[Youkoso Japari Park e|ようこそジャパリパークへ]] (CHALLENGE): 195
-# Prey (CHALLENGE): 181
-# Firestorm (CHALLENGE): 165
 ; Highest AIR values per difficulty
 * Single
 ** BEGINNER: [[DXY!]] (60)
-** BASIC: [[MAXX UNLIMITED]]/[[Unreal]] (108)
+** BASIC: [[MAXX UNLIMITED]] / [[Unreal]] (108)
 ** DIFFICULT: Unreal (132)
 ** EXPERT: [[Shakunetsu Beach Side Bunny|灼熱Beach Side Bunny]] (128)
@@ Line 136: / Line 146: @@
 ** BASIC: Unreal (113)
 ** DIFFICULT: [[TRIP MACHINE PhoeniX]] (110)
-** EXPERT: 灼熱Beach Side Bunny (122)
+** EXPERT: MEGALOVANIA (198)
-** CHALLENGE: POSSESSION (20th Anniversary Mix) (224)
+** CHALLENGE: MEGALOVANIA (245)
 ; Scoring
@@ Line 143: / Line 153: @@
 == FREEZE ==
-'''FREEZE''' is denoted as the total length of the chart's Freeze Arrows. [[D2R|D2R ("FREEZE" Special)]]'s charts currently have the highest FREEZE value of 200.
+'''FREEZE''' (踏みっぱ度) is denoted as the total length of the chart's Freeze Arrows. [[D2R|D2R ("FREEZE" Special)]]'s charts currently have the highest FREEZE value of 200.
 It is calculated as:
@@ Line 160: / Line 170: @@
 ; Rankings (Single)
 # D2R ("FREEZE" Special) (CHALLENGE): 200
-# [[CURUS]] (DIFFICULT): 173
+# [[CURUS]] (DIFFICULT) / [[Draw the Savage]] (CHALLENGE): 173
 # [[in love wit you]] (EXPERT): 168
 # [[Freeze]] (DIFFICULT): 146
@@ Line 189: / Line 199: @@
 == CHAOS ==
-'''CHAOS''' refers to the amount of steps that do not match well with the beat of the song. The song [[CHAOS]] is notable for having very high CHAOS values for its charts, with its CHALLENGE charts having the current highest value of 200.
+'''CHAOS''' (変則度) refers to the amount of steps that do not match well with the beat of the song. The song with the highest CHAOS value is BREAKING THE FUTURE, which has Single and Double CHALLENGE charts with CHAOS values of 211 and 218, respectively.
 In practice, it is determined by multiple factors.
@@ Line 222: / Line 232: @@
 # [[Fascination MAXX]] (Single BASIC): Total Chaos Base Value = 547.99359 and Total BPM Delta = 3,500 in 101.225 seconds, Unit Chaos Degree = 1,290, CHAOS = 64.
 # Valkyrie dimension (Single CHALLENGE): CHAOS = 153.
-# CHAOS (Double CHALLENGE): Total Chaos Base Value = 4,116 and Total BPM Delta = 7,480 in 87.882 seconds, Unit Chaos Degree = 20,628, CHAOS = 200.
+# [[CHAOS]] (Double CHALLENGE): Total Chaos Base Value = 4,116 and Total BPM Delta = 7,480 in 87.882 seconds, Unit Chaos Degree = 20,628, CHAOS = 200.
 ; Rankings (Single)
-# CHAOS (CHALLENGE): 200
+# BREAKING THE FUTURE (CHALLENGE): 211
+# [[CHAOS]] (CHALLENGE): 200
 # [[ANTI ANTHEM]] (EXPERT): 199
 # ACE FOR ACES (CHALLENGE): 175
 # [[ORCA]] (EXPERT): 172
-# [[CHAOS Terror-Tech Mix]] (CHALLENGE): 169
 ; Rankings (Double)
+# BREAKING THE FUTURE (CHALLENGE): 218
 # CHAOS (CHALLENGE): 200
-# ACE FOR ACES (CHALLENGE)/ORCA (EXPERT): 188
+# ACE FOR ACES (CHALLENGE) / ORCA (EXPERT): 188
-# ANTI ANTHEM (EXPERT)/CHAOS Terror-Tech Mix (CHALLENGE): 181
+# ANTI ANTHEM (EXPERT) / [[CHAOS Terror-Tech Mix]] (CHALLENGE): 181
 # CHAOS (EXPERT): 177
-# [[Over The "Period"|Over The “Period”]] (CHALLENGE): 161
 ; Highest CHAOS values per difficulty
@@ Line 244: / Line 254: @@
 ** DIFFICULT: CHAOS (134)
 ** EXPERT: ANTI ANTHEM (199)
-** CHALLENGE: CHAOS (200)
+** CHALLENGE: BREAKING THE FUTURE (211)
 * Double
 ** BASIC: CHAOS (117)
 ** DIFFICULT: CHAOS (142)
 ** EXPERT: ORCA (188)
-** CHALLENGE: CHAOS (200)
+** CHALLENGE: BREAKING THE FUTURE (218)
 ; Scoring
@@ Line 281: / Line 291: @@
 == Trivia ==
-* In [[CS DDR SuperNOVA2 NA|DanceDanceRevolution SuperNOVA2 CS (America)]], all charts are shown with a much higher STREAM value on the GROOVE RADAR than they normally would.
+* In [[CS DDR SuperNOVA2 NA|DanceDanceRevolution SuperNOVA2 CS (North America)]], all charts are shown with a much higher STREAM value on the GROOVE RADAR than they normally would.
+* Three other BEMANI games also have a similar feature, albeit with six parameters instead of five:
+** GuitarFreaks & Drummania (pre-XG): Radar Chart, introduced in [[AC GFDM V3|GuitarFreaks V3 & DrumMania V3]].
+** beatmania IIDX: NOTES RADAR, introduced in [[AC HEROIC VERSE|beatmania IIDX 27 HEROIC VERSE]].
+** SOUND VOLTEX: EFFECT RADAR, introduced in [[AC SDVX EG|SOUND VOLTEX EXCEED GEAR]].
 [[Category:DDR]]
 [[Category:Terminology]]